Roughing and trimming machine



Sept. 7, 1943.

c. G. BROSTROM ROUGHING AND TRIMMING MACHINE Filed Dec. 24, 1941 2 Sheets-Sheet l ROUGHING AND TRIMMING MACHINE Patented Sept. 7, 1943 UNITED STATES PATENT OFFICE RGUGHI'NG AND TRIMMING (Shades G; Brostrom, Salemhfltlaset, assign-or to United Shoe Machinery Corporation, Flemington, NZ J1, a corporation of New Jersey KpplibationDecember 24, 1541," Serial Nor 421 ,3739

'7 Claims.

This invention relates to roughing and trimmlng machines and i's-herein described andillustrated as embodied in a combination machine for simultaneously roughing the welt of a lasted and weltedshoe andtrimmi'ng' and roughing the inseam of the shoe, to prepare the shoe bottom for the reception of'sole attaching cement.

In the ordinary processof making Goodyear welt shoes the inseam is trimmed, aiter the welt is sewed to the upper and the insole rib, by a commerciat inseam trimming machine whichr'emoves the bulk of the excess upper materials, leaving the surface of the materials at the inseam sunici'ently fiat and'level to afl'ord a shoe bottom satisfactory for the reception ofan out sole'which' i's to-beattach'ed to the welt by stitching, as is done in the conventional Goodyear process;

When, however, the outsole is to be attached by the cement processit is necessary that the inseam be trimmed more closely and evenly and that the material, including the flesh surface of the Weltgbe abradedor'roughed in order to prepare them in the best manner for the reception of the sole attaching cement.

ms an object of the present invention to provide a machine for performing the above-mentioned actions of trimming and roughing" in a single: operation, thus avoiding the necessity of operating separately upon the' roughly trimmed imieaanin order to prepare it for the final roughing 'step;

With this object in view I have developed a novel ma'chlne in wn'icnmeansfo'r supportingthe weltiof a lasted shoe is combined with means for abrading or roughing? the welt thus supported, and with other means iortrimming and roughing the inseam of the shoe'simultaneouslywith the roughing" of the" welt.

Preferably, power driven mechanism is provided for feeding the shoe past the operating tools, and a; feature of the-invention resides in a' novel arrangement of a' feed wheel adapted-to engage the insole rib of the shoe and cooperating' with the welt-i support to cause the" shoe to-be fed progressively past the trimming and roughing tools.

In'the machine illustrated-herein the welt support comprises a disk constructed and" arranged to support the welt and to'enter the welt crease of the shoe, means beingprovided for moving the disk yieldingly towardthe'feed whe'el 'to" press the insole rib against the latter.

The invention also includes an improved feed wheel mounting, including a supporting plate upon which the feed wheel" is loosely sustained, a dri'veshaft for the feedw'heel; and a loose driving connection between the shaft and the feed Wheel. As shown, the feed wheel supportin plate is angularl-y adjustable and the connection between the drive shaft" and the feed wheel is constructed to permit universal" angular movement of the feed wheel relative to the shaft, in order that-thedriving' connection shall be maintained regardless' oi theang'le to which the supporting plate upon which the" feed wheel rests is adjusted. 7

These and other features of the invention will be better understoodand appreciatedfromreading the following-detailed description of one enibodiment thereof in connection with the accompanyingdrawings, in which Fig.- 1 is a perspective view of the operating mechanism ofthe machine;-

Fig's; 2 and 3 are views in plan andelevation; respectively, of a detail of themechanism shown in Fig. 1; and

Fig. 4 is a vie'tv inside elevationof the work supporting; feeding; and roughing instrumentalitiesl Referring now to the drawings, It indicates variousportions of a stationary frame in which the movable parts are mounted and by which they" are supported Pivotally mounted at l2 in the stationary frame lil is a rockshaft l8 from which extends rearward a horizontal arm It; integral with an upright swinging arm IS. A- block' 20 is secured toth'erupper end of the arm 18 by a bolt 22 which passes through: a slot 24 in the arm,- to provide for vertical adjustment of'the block.

Adjustably' held by' set screws 26 in guide grooves ZB iormedin' the block 28 is ayoke 31) at theforward end of which is mounted a welt supporting disk- 32 having a frusto-conical work engagingface 34, The disk 32 is freely rotatable around a stud 36 which is screwed intothe yoke 39.

Integral with the arm l8 and extendi'ng'rearward therefrom is an arm 38' the rear end of which is connected by apull spring 40 to a stationary hook 421 the tendency of the spring being to swing the arm I8 forward about the axis of the pivot l2. The limit of this forward movement is adjustably determined by a stop screw 44- threaded through the arm l8" at a position Where the point of the screw will strike, and be stopped by engagement with, the stationary frame l0. Movement of the arm l8 about the pivot l2 against the'tensionof th'espringfll is effected by depression of a treadle (not shown) to which a treadle rod is connected, the treadle rod being also adjustably connected by a wing nut 48 to the arm 38.

From the foregoing it will be apparent that depression of the treadle will move the welt support 32 rearward and that when the treadle is released the spring 43 will move the said support forward to a position determined by the adjust ment of the stop screw 44.

Also connected to and movable with the above mentioned treadle is a second treadle rod 50 the upper end of which is connected to a lever 52 afiixed to a gear 54 rotatable about a stationary stud 56. Another lever 58 is afiixed to a gear 69) which is rotatable about a stationary stud E2 and meshes with the gear 54.

Raised upon the forward end of the lever at is a slide 64 which is movable up and down upon a rib 65 projecting from a guide plate 58 secured to a stationary portion I5 of the machine frame by screws I2. As shown in Fig. 3, the rib E6 is not quite vertical but is inclined rearward for a reason which will presently appear. The limit to which the slide can descend is adjustably determined by a stop screw 65, the point of which is engaged by either the lever 53 or the lower end of the slide.

Bolted. to the slide 64 is an upwardly and forwardly extending bracket member M- which is connected to a stationary hook it by a pull spring 18, the tension of which may be adjusted by turning a thumb nut 80. The function of this spring is to draw the slide 65 and the mechanism supported by it downward with the amount of force that may be desired.

Secured to the forwardly extending portion of the bracket 14 is a supporting yoke 82 having pivots upon which'is supported an angle member 33. Clamped in the member 36 by a screw 88 is a downwardly extending bar 5'11 to which a block 82 is secured by a set screw St. A short shaft is journaled for rotation in the block 92 and has affixed to its upper end a pinion 93 arranged to mesh with a pinion I which is secured to a vertical shaft I62 journaled for rotation in a stationary bearing I94 and having atfixed to its upper end a pulley m5 driven by a belt I08 from any convenient source of power. The pinion I00 is somewhat tapered, the teeth at the line of engagement with the pinion 98 being substantially parallel to the inclined rib 68 in order that the two pinions may remain in mesh although the block 92, which carries the pinion $8, may be raised or lowered by operating the treadle. The distance through which the lock 92 is raised or lowered is so small that the inclination of the rib 56 provides suiiiciently for the horizontal component of movement of the slide 54- necessitated by the fact that the tool shaft I38 swings about a center located in its rear bearing.

A bracket arm I it is adjustably secured to the side of the block 92 by a bolt passing through a slot Iii! in the bracket arm and a horizontal stud Ii I extends laterally from the lower end portion, serving as a mounting for a feed wheel supporting guard plate H6 which is adiustably secured upon the stud by a set screw H8.

The lower end of the shaft 96 is ball shaped and the hollow hub portion of a feed wheel iii fits over it as shown in Fig. 4, the said hub portion being slotted at I22 to receive a pin I2 1 which passes transversely through the ball end portion of the shaft 96. The pin I24 and slot I22, to-

gether with the ball and socket formation of the shaft 9'6 and the hub of the feed wheel I28, forms a loose, universal driving connection between the shaft and the feed wheel which rests loosely upon the upper face of the guard plate IIS and is sustained thereby. By adjustment of the bracket arm i I6 and of the guard plate I it thereon the angle of the feed wheel relative to its drive shaft 25 may be readily changed as conditions may require.

A strut I26 extends from a block I28 secured to the bracket member I4 to the block 92 and is adjustably clamped thereto by a bolt I38 which passes through the slot end portion I 32 of the strut. By loosening the bolt ltd it becomes possible to adjust the block 92, and the feed wheel Md and drive shaft Q5 carried thereby, about the axis of the pivots 85.

An inseam trimming and roughing tool I34 and a welt abrading or roughing tool I33 are secured upon a shaft I38 which is journaled for rotation in self- -alining bearings, one of which is supported at I 13 in the slide 64 and the other of win is mounted in the stationary frame Ii]. The welt abrading or roughing tool I36 is preferably a tool of the type disclosed and claimed in my co-pending application, Serial No. 404,284, filed July 28, 1941, and the inseam trimming tool it nay consist of a cutting and abrading tool, preferably having a number of toothed elements as indicated at I52, which will serve to trim and rou n the trimmed surface of the inseam of a shoe.

In 4 a welted shoe S, upon a last L, is shown in position for operation upon the inseam welt, the inseam materials being designated by I and the welt by W. In operation the operator depresses the treadle, lowering the treadle rods 56 and 5t and thereby swinging the welt supporting disk 32 rearward and elevating the tool shaft I38 and the guard IE6 and feed wheel iii? associated with the tool. The welted shoe is presented to the machine by starting the welt upon the welt supporting disk 32 and releasing the treadle whereupon the guard IIS and the feed wheel I26 descend into engagement with the insole of the shoe, the feed wheel engaging the inner face of the upstanding rib or" the insole. The feed disk moves forward at the time into the welt crease of the shoe causing the insole rib to be forced against the periphery of the feed wheel I20, by which the shoe is fed progressively beneath the tools i3 2 and 53%, they having descended into engagement with the work simultaneously with the descent of the feed wheel and the guard IIS and bein yieldingly pressed into engagement with the work b the action of the spring '58.

The feed Wheel is driven at a moderate speed, suitable for the rate at which the work should be fed past the roughing tool, while the roughing tool is driven at a high speed by a belt l id, engagin a pulley i 26 upon the rear end of the shaft By the above described apparatus the welt portion of the shoe is supported and fed accurately beneath the tool assembly which operates simultaneously to trim the inseam materials to the level of the welt surface and to roughen the surof both the inseam and the welt to prepare them properly for the reception of cement.

Having thus described the invention, what I claim as new and desire to secure by Letters Patent of the United States is:

i 1. In a roughing and trimming machine. the

combination of means for supporting the welt of a lasted shoe, means for roughing the welt thus supported, and other means, of different structure, for trimming and roughing the inseam of the shoe simultaneously with the roughing of the welt.

2. In a roughing and trimming machine, the combination of means for supporting the welt of a lasted shoe, means for abrading the surface of the welt thus supported, means for trimming the inseam of the shoe, and power driven mechanism for feeding the shoe past said means.

3. In a roughing and trimming machine, the combination of means for supporting the welt of a lasted shoe, means for abrading the surface of the welt thus supported, means for trimming the inseam of the shoe, and a power driven feed wheel arranged to engage the rib of the insole of the shoe, to feed the shoe past said means.

4. In a machine of the class described, the combination of a Welt supporting disk constructed and arranged ltO enter the welt crease of a lasted shoe, a power driven feed wheel arranged to engage the rib of the insole and feed the shoe, means for moving said disk yieldingly toward the feed Wheel to press the insole rib against the latter, and a power driven combination tool disposed in cooperative relation to the disk and feed wheel to rough the welt and trim the inseam of the shoe while it is being fed.

5. In a machine of the class described, the combination of a power driven feed wheel arranged to engage the rib of the insole of a lasted welt shoe, a disk arranged to support the welt and engage the upper of the shoe, means for yieldingly forcing the disk toward the feed wheel to press the insole rib against the latter, a power driven abrading tool for operating up n the surface of the welt, and means for yieldingly pressing said tool into engagement with the Work.

6. In a machine of the class described, the combination of a work support, a feed wheel cooperatively related to the Work support to feed a shoe supported thereby, a feed wheel supporting plate upon which the feed wheel is loosely sustained, a drive shaft for the feed wheel, and a loose driving connection between said shaft and the feed wheel.

7. In a machine of the class described, the combination of a work support, a feed wheel 00- operatively related to the work support to feed a shoe supported thereby, an angularly adjustable feed wheel supporting plate upon which the feed wheel is loosely sustained, a drive shaft for the feed wheel, and a loose driving connection between said shaft and the feed wheel, said connection permitting universal angular movement of the feed wheel relative to the shaft.

CHARLES G. BROSTROM. 

